Calcium carbonate (about 95%)
Small amounts of proteins and minerals
There is also a thin membrane inside the shell (called the eggshell membrane) that contains:
Collagen
Glucosamine
Chondroitin
👉 These are compounds linked to joint health.
⚠️ The Problem With the Viral Claim
Here’s the important part:
❌ Eggshells themselves are NOT a direct cure for joint collagen loss
❌ Grinding and eating eggshells is not a proven medical treatment
❌ The body doesn’t simply turn eggshell powder into knee cartilage
While calcium is good for bones, it doesn’t directly rebuild joint cartilage.
🧪 What Science Actually Suggests
Some studies show that eggshell membrane supplements (not raw shells) may:
✔️ Reduce joint pain slightly
✔️ Improve flexibility in some people
✔️ Support overall joint comfort
But:
👉 These are processed, purified supplements—not homemade powders
👉 Results are modest, not miraculous
Risks of Using Eggshells at Home
Before you consider trying this:
❗ Risk of bacterial contamination (like salmonella)
❗ Sharp particles can damage your throat or digestion
❗ Incorrect preparation can be unsafe
This is not something to casually try based on social media advice.
✅ What Actually Helps Your Knees
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